./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-patterns/array3_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6184f548-6337-4fc4-aff6-c54bf2bf13d2/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6184f548-6337-4fc4-aff6-c54bf2bf13d2/bin/utaipan-verify-SwPr7d2a91/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6184f548-6337-4fc4-aff6-c54bf2bf13d2/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6184f548-6337-4fc4-aff6-c54bf2bf13d2/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-patterns/array3_pattern.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6184f548-6337-4fc4-aff6-c54bf2bf13d2/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6184f548-6337-4fc4-aff6-c54bf2bf13d2/bin/utaipan-verify-SwPr7d2a91 --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8c9f77a5f5cfb41429e6b2e557580f5f8a855ca718c241fb5a07541ef3b21ab2 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 23:19:51,735 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 23:19:51,855 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6184f548-6337-4fc4-aff6-c54bf2bf13d2/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-24 23:19:51,866 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 23:19:51,867 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 23:19:51,914 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 23:19:51,915 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 23:19:51,916 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 23:19:51,917 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 23:19:51,917 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 23:19:51,918 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-24 23:19:51,918 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-24 23:19:51,919 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-24 23:19:51,920 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-24 23:19:51,920 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-24 23:19:51,921 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-24 23:19:51,921 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-24 23:19:51,922 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-24 23:19:51,923 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-24 23:19:51,924 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-24 23:19:51,924 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-24 23:19:51,925 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-24 23:19:51,926 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 23:19:51,927 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 23:19:51,927 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 23:19:51,928 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 23:19:51,928 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 23:19:51,929 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 23:19:51,929 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 23:19:51,930 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 23:19:51,930 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 23:19:51,931 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 23:19:51,931 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 23:19:51,932 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 23:19:51,932 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 23:19:51,933 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 23:19:51,933 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 23:19:51,933 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:19:51,933 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 23:19:51,934 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 23:19:51,934 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 23:19:51,934 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-24 23:19:51,935 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 23:19:51,935 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 23:19:51,935 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 23:19:51,936 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-24 23:19:51,936 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 23:19:51,936 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6184f548-6337-4fc4-aff6-c54bf2bf13d2/bin/utaipan-verify-SwPr7d2a91/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6184f548-6337-4fc4-aff6-c54bf2bf13d2/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8c9f77a5f5cfb41429e6b2e557580f5f8a855ca718c241fb5a07541ef3b21ab2 [2023-11-24 23:19:52,241 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 23:19:52,282 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 23:19:52,285 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 23:19:52,287 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 23:19:52,288 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 23:19:52,289 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6184f548-6337-4fc4-aff6-c54bf2bf13d2/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/array-patterns/array3_pattern.c [2023-11-24 23:19:55,502 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 23:19:55,833 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 23:19:55,837 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6184f548-6337-4fc4-aff6-c54bf2bf13d2/sv-benchmarks/c/array-patterns/array3_pattern.c [2023-11-24 23:19:55,847 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6184f548-6337-4fc4-aff6-c54bf2bf13d2/bin/utaipan-verify-SwPr7d2a91/data/41c8c4103/a68733a9d6a94c698f36c8e90edc723d/FLAGdad3e2a1b [2023-11-24 23:19:55,869 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6184f548-6337-4fc4-aff6-c54bf2bf13d2/bin/utaipan-verify-SwPr7d2a91/data/41c8c4103/a68733a9d6a94c698f36c8e90edc723d [2023-11-24 23:19:55,879 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 23:19:55,882 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 23:19:55,884 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 23:19:55,885 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 23:19:55,891 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 23:19:55,892 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:19:55" (1/1) ... [2023-11-24 23:19:55,893 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42a087fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:19:55, skipping insertion in model container [2023-11-24 23:19:55,894 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:19:55" (1/1) ... [2023-11-24 23:19:55,924 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 23:19:56,135 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6184f548-6337-4fc4-aff6-c54bf2bf13d2/sv-benchmarks/c/array-patterns/array3_pattern.c[1393,1406] [2023-11-24 23:19:56,187 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:19:56,199 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 23:19:56,214 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6184f548-6337-4fc4-aff6-c54bf2bf13d2/sv-benchmarks/c/array-patterns/array3_pattern.c[1393,1406] [2023-11-24 23:19:56,251 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:19:56,276 INFO L206 MainTranslator]: Completed translation [2023-11-24 23:19:56,276 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:19:56 WrapperNode [2023-11-24 23:19:56,277 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 23:19:56,279 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 23:19:56,279 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 23:19:56,279 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 23:19:56,287 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:19:56" (1/1) ... [2023-11-24 23:19:56,300 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:19:56" (1/1) ... [2023-11-24 23:19:56,326 INFO L138 Inliner]: procedures = 17, calls = 26, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 90 [2023-11-24 23:19:56,326 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 23:19:56,328 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 23:19:56,328 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 23:19:56,329 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 23:19:56,339 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:19:56" (1/1) ... [2023-11-24 23:19:56,340 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:19:56" (1/1) ... [2023-11-24 23:19:56,343 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:19:56" (1/1) ... [2023-11-24 23:19:56,343 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:19:56" (1/1) ... [2023-11-24 23:19:56,350 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:19:56" (1/1) ... [2023-11-24 23:19:56,355 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:19:56" (1/1) ... [2023-11-24 23:19:56,356 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:19:56" (1/1) ... [2023-11-24 23:19:56,358 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:19:56" (1/1) ... [2023-11-24 23:19:56,361 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 23:19:56,362 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 23:19:56,362 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 23:19:56,362 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 23:19:56,363 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:19:56" (1/1) ... [2023-11-24 23:19:56,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:19:56,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6184f548-6337-4fc4-aff6-c54bf2bf13d2/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:19:56,397 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6184f548-6337-4fc4-aff6-c54bf2bf13d2/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-24 23:19:56,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6184f548-6337-4fc4-aff6-c54bf2bf13d2/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-24 23:19:56,441 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 23:19:56,441 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-24 23:19:56,441 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-24 23:19:56,441 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-24 23:19:56,442 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 23:19:56,442 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-24 23:19:56,442 INFO L130 BoogieDeclarations]: Found specification of procedure square [2023-11-24 23:19:56,442 INFO L138 BoogieDeclarations]: Found implementation of procedure square [2023-11-24 23:19:56,443 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 23:19:56,443 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 23:19:56,443 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-24 23:19:56,443 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 23:19:56,538 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 23:19:56,544 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 23:19:56,863 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 23:19:56,927 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 23:19:56,928 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-24 23:19:56,930 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:19:56 BoogieIcfgContainer [2023-11-24 23:19:56,931 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 23:19:56,934 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 23:19:56,934 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 23:19:56,938 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 23:19:56,939 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 11:19:55" (1/3) ... [2023-11-24 23:19:56,941 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ba6991d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:19:56, skipping insertion in model container [2023-11-24 23:19:56,941 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:19:56" (2/3) ... [2023-11-24 23:19:56,942 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ba6991d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:19:56, skipping insertion in model container [2023-11-24 23:19:56,943 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:19:56" (3/3) ... [2023-11-24 23:19:56,945 INFO L112 eAbstractionObserver]: Analyzing ICFG array3_pattern.c [2023-11-24 23:19:56,966 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 23:19:56,966 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-24 23:19:57,032 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 23:19:57,040 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@9fcc8ba, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 23:19:57,041 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-24 23:19:57,046 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-24 23:19:57,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-24 23:19:57,056 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:19:57,057 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:19:57,057 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:19:57,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:19:57,065 INFO L85 PathProgramCache]: Analyzing trace with hash 869276410, now seen corresponding path program 1 times [2023-11-24 23:19:57,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:19:57,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823671213] [2023-11-24 23:19:57,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:19:57,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:19:57,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:19:57,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:19:57,284 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:19:57,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823671213] [2023-11-24 23:19:57,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823671213] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:19:57,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:19:57,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 23:19:57,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714835328] [2023-11-24 23:19:57,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:19:57,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-24 23:19:57,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:19:57,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-24 23:19:57,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-24 23:19:57,326 INFO L87 Difference]: Start difference. First operand has 23 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 23:19:57,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:19:57,369 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2023-11-24 23:19:57,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-24 23:19:57,372 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-11-24 23:19:57,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:19:57,380 INFO L225 Difference]: With dead ends: 36 [2023-11-24 23:19:57,381 INFO L226 Difference]: Without dead ends: 21 [2023-11-24 23:19:57,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-24 23:19:57,388 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 23:19:57,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 23:19:57,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-11-24 23:19:57,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-11-24 23:19:57,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-24 23:19:57,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2023-11-24 23:19:57,464 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 11 [2023-11-24 23:19:57,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:19:57,478 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2023-11-24 23:19:57,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 23:19:57,478 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2023-11-24 23:19:57,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-24 23:19:57,479 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:19:57,480 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:19:57,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 23:19:57,480 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:19:57,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:19:57,481 INFO L85 PathProgramCache]: Analyzing trace with hash 583031080, now seen corresponding path program 1 times [2023-11-24 23:19:57,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:19:57,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537094953] [2023-11-24 23:19:57,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:19:57,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:19:57,539 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 23:19:57,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [137498828] [2023-11-24 23:19:57,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:19:57,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:19:57,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6184f548-6337-4fc4-aff6-c54bf2bf13d2/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:19:57,551 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6184f548-6337-4fc4-aff6-c54bf2bf13d2/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:19:57,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6184f548-6337-4fc4-aff6-c54bf2bf13d2/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 23:19:57,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:19:57,655 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-24 23:19:57,661 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:19:57,829 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-24 23:19:57,830 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:19:57,830 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:19:57,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537094953] [2023-11-24 23:19:57,831 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 23:19:57,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137498828] [2023-11-24 23:19:57,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137498828] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:19:57,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:19:57,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 23:19:57,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380188689] [2023-11-24 23:19:57,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:19:57,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:19:57,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:19:57,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:19:57,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:19:57,836 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-24 23:19:57,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:19:57,891 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2023-11-24 23:19:57,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 23:19:57,892 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2023-11-24 23:19:57,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:19:57,893 INFO L225 Difference]: With dead ends: 27 [2023-11-24 23:19:57,893 INFO L226 Difference]: Without dead ends: 24 [2023-11-24 23:19:57,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:19:57,895 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 4 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 23:19:57,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 43 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 23:19:57,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-11-24 23:19:57,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2023-11-24 23:19:57,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-24 23:19:57,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2023-11-24 23:19:57,906 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 16 [2023-11-24 23:19:57,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:19:57,906 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2023-11-24 23:19:57,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-24 23:19:57,907 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2023-11-24 23:19:57,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-24 23:19:57,908 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:19:57,909 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:19:57,924 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6184f548-6337-4fc4-aff6-c54bf2bf13d2/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-24 23:19:58,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6184f548-6337-4fc4-aff6-c54bf2bf13d2/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:19:58,116 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:19:58,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:19:58,117 INFO L85 PathProgramCache]: Analyzing trace with hash -734185303, now seen corresponding path program 1 times [2023-11-24 23:19:58,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:19:58,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051510664] [2023-11-24 23:19:58,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:19:58,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:19:58,182 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 23:19:58,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1460721686] [2023-11-24 23:19:58,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:19:58,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:19:58,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6184f548-6337-4fc4-aff6-c54bf2bf13d2/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:19:58,205 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6184f548-6337-4fc4-aff6-c54bf2bf13d2/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:19:58,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6184f548-6337-4fc4-aff6-c54bf2bf13d2/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 23:19:58,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:19:58,293 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-24 23:19:58,296 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:19:58,351 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-24 23:19:58,351 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:19:58,352 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:19:58,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051510664] [2023-11-24 23:19:58,352 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 23:19:58,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460721686] [2023-11-24 23:19:58,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460721686] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:19:58,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:19:58,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 23:19:58,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436643683] [2023-11-24 23:19:58,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:19:58,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 23:19:58,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:19:58,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 23:19:58,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:19:58,357 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-24 23:19:58,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:19:58,447 INFO L93 Difference]: Finished difference Result 45 states and 54 transitions. [2023-11-24 23:19:58,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 23:19:58,448 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 25 [2023-11-24 23:19:58,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:19:58,449 INFO L225 Difference]: With dead ends: 45 [2023-11-24 23:19:58,449 INFO L226 Difference]: Without dead ends: 27 [2023-11-24 23:19:58,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-24 23:19:58,451 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 8 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:19:58,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 47 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:19:58,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-11-24 23:19:58,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2023-11-24 23:19:58,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-24 23:19:58,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2023-11-24 23:19:58,460 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 25 [2023-11-24 23:19:58,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:19:58,461 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2023-11-24 23:19:58,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-24 23:19:58,461 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2023-11-24 23:19:58,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-24 23:19:58,462 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:19:58,463 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:19:58,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6184f548-6337-4fc4-aff6-c54bf2bf13d2/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-24 23:19:58,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6184f548-6337-4fc4-aff6-c54bf2bf13d2/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:19:58,668 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:19:58,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:19:58,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1150030784, now seen corresponding path program 1 times [2023-11-24 23:19:58,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:19:58,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657465229] [2023-11-24 23:19:58,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:19:58,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:19:58,703 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 23:19:58,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [690592632] [2023-11-24 23:19:58,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:19:58,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:19:58,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6184f548-6337-4fc4-aff6-c54bf2bf13d2/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:19:58,705 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6184f548-6337-4fc4-aff6-c54bf2bf13d2/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:19:58,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6184f548-6337-4fc4-aff6-c54bf2bf13d2/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-24 23:19:58,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:19:58,867 WARN L260 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 71 conjunts are in the unsatisfiable core [2023-11-24 23:19:58,877 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:19:58,986 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-24 23:19:59,073 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-11-24 23:19:59,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:59,628 INFO L349 Elim1Store]: treesize reduction 100, result has 13.0 percent of original size [2023-11-24 23:19:59,628 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 41 [2023-11-24 23:20:00,488 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:20:00,489 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:20:22,303 WARN L876 $PredicateComparison]: unable to prove that (let ((.cse14 (mod (+ c_~ARR_SIZE~0 4294967295) 4294967296))) (let ((.cse8 (* .cse14 4)) (.cse9 (select |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base|))) (and (forall ((v_z_4 Int)) (let ((.cse0 (+ .cse14 v_z_4))) (or (< 6442450943 .cse0) (< .cse0 4294967296) (forall ((v_y_4 Int)) (let ((.cse12 (* v_y_4 4294967296)) (.cse13 (* 4294967295 v_z_4))) (let ((.cse11 (+ .cse12 .cse13))) (or (let ((.cse7 (* |c_ULTIMATE.start_main_~num~0#1| .cse11))) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (let ((.cse10 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| (* 17179869180 v_z_4) (* 17179869184 v_y_4)))) (store .cse9 .cse10 (+ (* .cse7 |c_ULTIMATE.start_main_~num~0#1|) (select .cse9 .cse10))))))) (let ((.cse3 (let ((.cse5 (select .cse2 |c_ULTIMATE.start_main_~#array2~0#1.base|)) (.cse6 (+ (- 17179869184) |c_ULTIMATE.start_main_~#array2~0#1.offset| (* v_z_4 4) .cse8))) (store .cse5 .cse6 (+ .cse7 (select .cse5 .cse6)))))) (= (+ |c_ULTIMATE.start_main_~sum1~0#1| (let ((.cse1 (select (select (store .cse2 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse3) |c_ULTIMATE.start_main_~#array1~0#1.base|) |c_ULTIMATE.start_main_~#array1~0#1.offset|))) (* .cse1 .cse1))) (+ (let ((.cse4 (select .cse3 |c_ULTIMATE.start_main_~#array2~0#1.offset|))) (* .cse4 .cse4)) |c_ULTIMATE.start_main_~sum2~0#1|))))) (< .cse11 0) (< c_~ARR_SIZE~0 (+ .cse12 .cse13 1)))))) (< 4294967295 v_z_4)))) (forall ((v_z_2 Int)) (or (< 4294967295 v_z_2) (forall ((v_y_2 Int)) (let ((.cse15 (* v_y_2 4294967296)) (.cse16 (* 4294967295 v_z_2))) (let ((.cse17 (+ .cse15 .cse16))) (or (< c_~ARR_SIZE~0 (+ .cse15 .cse16 1)) (< .cse17 0) (let ((.cse24 (* .cse17 |c_ULTIMATE.start_main_~num~0#1|))) (let ((.cse19 (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (let ((.cse25 (+ (* 17179869180 v_z_2) |c_ULTIMATE.start_main_~#array1~0#1.offset| (* 17179869184 v_y_2)))) (store .cse9 .cse25 (+ (* .cse24 |c_ULTIMATE.start_main_~num~0#1|) (select .cse9 .cse25))))))) (let ((.cse20 (let ((.cse22 (select .cse19 |c_ULTIMATE.start_main_~#array2~0#1.base|)) (.cse23 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| (* v_z_2 4) .cse8 (- 34359738368)))) (store .cse22 .cse23 (+ .cse24 (select .cse22 .cse23)))))) (= (+ |c_ULTIMATE.start_main_~sum1~0#1| (let ((.cse18 (select (select (store .cse19 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse20) |c_ULTIMATE.start_main_~#array1~0#1.base|) |c_ULTIMATE.start_main_~#array1~0#1.offset|))) (* .cse18 .cse18))) (+ (let ((.cse21 (select .cse20 |c_ULTIMATE.start_main_~#array2~0#1.offset|))) (* .cse21 .cse21)) |c_ULTIMATE.start_main_~sum2~0#1|))))))))) (< (+ .cse14 v_z_2) 6442450944))) (forall ((v_z_4 Int)) (or (< 2147483647 (+ .cse14 v_z_4)) (< v_z_4 0) (forall ((v_y_4 Int)) (let ((.cse35 (* v_y_4 4294967296)) (.cse36 (* 4294967295 v_z_4))) (let ((.cse34 (+ .cse35 .cse36))) (let ((.cse32 (* |c_ULTIMATE.start_main_~num~0#1| .cse34))) (let ((.cse27 (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (let ((.cse41 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| (* 17179869180 v_z_4) (* 17179869184 v_y_4)))) (store .cse9 .cse41 (+ (* .cse32 |c_ULTIMATE.start_main_~num~0#1|) (select .cse9 .cse41))))))) (let ((.cse30 (select .cse27 |c_ULTIMATE.start_main_~#array2~0#1.base|)) (.cse33 (* v_z_4 4))) (or (let ((.cse28 (let ((.cse31 (+ (- 17179869184) |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse33 .cse8))) (store .cse30 .cse31 (+ .cse32 (select .cse30 .cse31)))))) (= (+ |c_ULTIMATE.start_main_~sum1~0#1| (let ((.cse26 (select (select (store .cse27 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse28) |c_ULTIMATE.start_main_~#array1~0#1.base|) |c_ULTIMATE.start_main_~#array1~0#1.offset|))) (* .cse26 .cse26))) (+ (let ((.cse29 (select .cse28 |c_ULTIMATE.start_main_~#array2~0#1.offset|))) (* .cse29 .cse29)) |c_ULTIMATE.start_main_~sum2~0#1|))) (< .cse34 0) (< c_~ARR_SIZE~0 (+ .cse35 .cse36 1)) (let ((.cse38 (let ((.cse40 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse33 .cse8))) (store .cse30 .cse40 (+ (select .cse30 .cse40) .cse32))))) (= (+ |c_ULTIMATE.start_main_~sum2~0#1| (let ((.cse37 (select .cse38 |c_ULTIMATE.start_main_~#array2~0#1.offset|))) (* .cse37 .cse37))) (+ (let ((.cse39 (select (select (store .cse27 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse38) |c_ULTIMATE.start_main_~#array1~0#1.base|) |c_ULTIMATE.start_main_~#array1~0#1.offset|))) (* .cse39 .cse39)) |c_ULTIMATE.start_main_~sum1~0#1|)))))))))))) (forall ((v_z_2 Int)) (or (< 4294967295 v_z_2) (forall ((v_y_2 Int)) (let ((.cse42 (* v_y_2 4294967296)) (.cse43 (* 4294967295 v_z_2))) (let ((.cse44 (+ .cse42 .cse43))) (let ((.cse51 (* .cse44 |c_ULTIMATE.start_main_~num~0#1|))) (let ((.cse48 (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (let ((.cse57 (+ (* 17179869180 v_z_2) |c_ULTIMATE.start_main_~#array1~0#1.offset| (* 17179869184 v_y_2)))) (store .cse9 .cse57 (+ (* .cse51 |c_ULTIMATE.start_main_~num~0#1|) (select .cse9 .cse57))))))) (let ((.cse49 (select .cse48 |c_ULTIMATE.start_main_~#array2~0#1.base|)) (.cse52 (* v_z_2 4))) (or (< c_~ARR_SIZE~0 (+ .cse42 .cse43 1)) (< .cse44 0) (let ((.cse46 (let ((.cse50 (+ (- 17179869184) |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse52 .cse8))) (store .cse49 .cse50 (+ (select .cse49 .cse50) .cse51))))) (= (+ |c_ULTIMATE.start_main_~sum2~0#1| (let ((.cse45 (select .cse46 |c_ULTIMATE.start_main_~#array2~0#1.offset|))) (* .cse45 .cse45))) (+ |c_ULTIMATE.start_main_~sum1~0#1| (let ((.cse47 (select (select (store .cse48 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse46) |c_ULTIMATE.start_main_~#array1~0#1.base|) |c_ULTIMATE.start_main_~#array1~0#1.offset|))) (* .cse47 .cse47))))) (let ((.cse54 (let ((.cse56 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse52 .cse8 (- 34359738368)))) (store .cse49 .cse56 (+ .cse51 (select .cse49 .cse56)))))) (= (+ |c_ULTIMATE.start_main_~sum1~0#1| (let ((.cse53 (select (select (store .cse48 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse54) |c_ULTIMATE.start_main_~#array1~0#1.base|) |c_ULTIMATE.start_main_~#array1~0#1.offset|))) (* .cse53 .cse53))) (+ (let ((.cse55 (select .cse54 |c_ULTIMATE.start_main_~#array2~0#1.offset|))) (* .cse55 .cse55)) |c_ULTIMATE.start_main_~sum2~0#1|)))))))))) (< (+ .cse14 v_z_2) 6442450944))) (forall ((v_z_2 Int)) (let ((.cse69 (+ .cse14 v_z_2))) (or (forall ((v_y_2 Int)) (let ((.cse58 (* v_y_2 4294967296)) (.cse59 (* 4294967295 v_z_2))) (let ((.cse60 (+ .cse58 .cse59))) (or (< c_~ARR_SIZE~0 (+ .cse58 .cse59 1)) (< .cse60 0) (let ((.cse67 (* .cse60 |c_ULTIMATE.start_main_~num~0#1|))) (let ((.cse64 (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (let ((.cse68 (+ (* 17179869180 v_z_2) |c_ULTIMATE.start_main_~#array1~0#1.offset| (* 17179869184 v_y_2)))) (store .cse9 .cse68 (+ (* .cse67 |c_ULTIMATE.start_main_~num~0#1|) (select .cse9 .cse68))))))) (let ((.cse62 (let ((.cse65 (select .cse64 |c_ULTIMATE.start_main_~#array2~0#1.base|)) (.cse66 (+ (- 17179869184) |c_ULTIMATE.start_main_~#array2~0#1.offset| (* v_z_2 4) .cse8))) (store .cse65 .cse66 (+ (select .cse65 .cse66) .cse67))))) (= (+ |c_ULTIMATE.start_main_~sum2~0#1| (let ((.cse61 (select .cse62 |c_ULTIMATE.start_main_~#array2~0#1.offset|))) (* .cse61 .cse61))) (+ |c_ULTIMATE.start_main_~sum1~0#1| (let ((.cse63 (select (select (store .cse64 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse62) |c_ULTIMATE.start_main_~#array1~0#1.base|) |c_ULTIMATE.start_main_~#array1~0#1.offset|))) (* .cse63 .cse63))))))))))) (< .cse69 2147483648) (< v_z_2 0) (< 4294967295 .cse69)))) (forall ((v_z_2 Int)) (let ((.cse86 (+ .cse14 v_z_2))) (or (forall ((v_y_2 Int)) (let ((.cse70 (* v_y_2 4294967296)) (.cse71 (* 4294967295 v_z_2))) (let ((.cse72 (+ .cse70 .cse71))) (let ((.cse79 (* .cse72 |c_ULTIMATE.start_main_~num~0#1|))) (let ((.cse76 (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (let ((.cse85 (+ (* 17179869180 v_z_2) |c_ULTIMATE.start_main_~#array1~0#1.offset| (* 17179869184 v_y_2)))) (store .cse9 .cse85 (+ (* .cse79 |c_ULTIMATE.start_main_~num~0#1|) (select .cse9 .cse85))))))) (let ((.cse77 (select .cse76 |c_ULTIMATE.start_main_~#array2~0#1.base|)) (.cse80 (* v_z_2 4))) (or (< c_~ARR_SIZE~0 (+ .cse70 .cse71 1)) (< .cse72 0) (let ((.cse74 (let ((.cse78 (+ (- 17179869184) |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse80 .cse8))) (store .cse77 .cse78 (+ (select .cse77 .cse78) .cse79))))) (= (+ |c_ULTIMATE.start_main_~sum2~0#1| (let ((.cse73 (select .cse74 |c_ULTIMATE.start_main_~#array2~0#1.offset|))) (* .cse73 .cse73))) (+ |c_ULTIMATE.start_main_~sum1~0#1| (let ((.cse75 (select (select (store .cse76 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse74) |c_ULTIMATE.start_main_~#array1~0#1.base|) |c_ULTIMATE.start_main_~#array1~0#1.offset|))) (* .cse75 .cse75))))) (let ((.cse82 (let ((.cse84 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse80 .cse8 (- 34359738368)))) (store .cse77 .cse84 (+ .cse79 (select .cse77 .cse84)))))) (= (+ |c_ULTIMATE.start_main_~sum1~0#1| (let ((.cse81 (select (select (store .cse76 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse82) |c_ULTIMATE.start_main_~#array1~0#1.base|) |c_ULTIMATE.start_main_~#array1~0#1.offset|))) (* .cse81 .cse81))) (+ (let ((.cse83 (select .cse82 |c_ULTIMATE.start_main_~#array2~0#1.offset|))) (* .cse83 .cse83)) |c_ULTIMATE.start_main_~sum2~0#1|)))))))))) (< .cse86 2147483648) (< v_z_2 0) (< 4294967295 .cse86)))) (forall ((v_z_4 Int)) (or (< 2147483647 (+ .cse14 v_z_4)) (< v_z_4 0) (forall ((v_y_4 Int)) (let ((.cse88 (* v_y_4 4294967296)) (.cse89 (* 4294967295 v_z_4))) (let ((.cse87 (+ .cse88 .cse89))) (or (< .cse87 0) (< c_~ARR_SIZE~0 (+ .cse88 .cse89 1)) (let ((.cse96 (* |c_ULTIMATE.start_main_~num~0#1| .cse87))) (let ((.cse93 (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (let ((.cse97 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| (* 17179869180 v_z_4) (* 17179869184 v_y_4)))) (store .cse9 .cse97 (+ (* .cse96 |c_ULTIMATE.start_main_~num~0#1|) (select .cse9 .cse97))))))) (let ((.cse91 (let ((.cse94 (select .cse93 |c_ULTIMATE.start_main_~#array2~0#1.base|)) (.cse95 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| (* v_z_4 4) .cse8))) (store .cse94 .cse95 (+ (select .cse94 .cse95) .cse96))))) (= (+ |c_ULTIMATE.start_main_~sum2~0#1| (let ((.cse90 (select .cse91 |c_ULTIMATE.start_main_~#array2~0#1.offset|))) (* .cse90 .cse90))) (+ (let ((.cse92 (select (select (store .cse93 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse91) |c_ULTIMATE.start_main_~#array1~0#1.base|) |c_ULTIMATE.start_main_~#array1~0#1.offset|))) (* .cse92 .cse92)) |c_ULTIMATE.start_main_~sum1~0#1|))))))))))) (forall ((v_z_4 Int)) (let ((.cse98 (+ .cse14 v_z_4))) (or (< 6442450943 .cse98) (< .cse98 4294967296) (< 4294967295 v_z_4) (forall ((v_y_4 Int)) (let ((.cse108 (* v_y_4 4294967296)) (.cse109 (* 4294967295 v_z_4))) (let ((.cse107 (+ .cse108 .cse109))) (let ((.cse105 (* |c_ULTIMATE.start_main_~num~0#1| .cse107))) (let ((.cse100 (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (let ((.cse114 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| (* 17179869180 v_z_4) (* 17179869184 v_y_4)))) (store .cse9 .cse114 (+ (* .cse105 |c_ULTIMATE.start_main_~num~0#1|) (select .cse9 .cse114))))))) (let ((.cse103 (select .cse100 |c_ULTIMATE.start_main_~#array2~0#1.base|)) (.cse106 (* v_z_4 4))) (or (let ((.cse101 (let ((.cse104 (+ (- 17179869184) |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse106 .cse8))) (store .cse103 .cse104 (+ .cse105 (select .cse103 .cse104)))))) (= (+ |c_ULTIMATE.start_main_~sum1~0#1| (let ((.cse99 (select (select (store .cse100 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse101) |c_ULTIMATE.start_main_~#array1~0#1.base|) |c_ULTIMATE.start_main_~#array1~0#1.offset|))) (* .cse99 .cse99))) (+ (let ((.cse102 (select .cse101 |c_ULTIMATE.start_main_~#array2~0#1.offset|))) (* .cse102 .cse102)) |c_ULTIMATE.start_main_~sum2~0#1|))) (< .cse107 0) (< c_~ARR_SIZE~0 (+ .cse108 .cse109 1)) (let ((.cse111 (let ((.cse113 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse106 .cse8))) (store .cse103 .cse113 (+ (select .cse103 .cse113) .cse105))))) (= (+ |c_ULTIMATE.start_main_~sum2~0#1| (let ((.cse110 (select .cse111 |c_ULTIMATE.start_main_~#array2~0#1.offset|))) (* .cse110 .cse110))) (+ (let ((.cse112 (select (select (store .cse100 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse111) |c_ULTIMATE.start_main_~#array1~0#1.base|) |c_ULTIMATE.start_main_~#array1~0#1.offset|))) (* .cse112 .cse112)) |c_ULTIMATE.start_main_~sum1~0#1|)))))))))))))))) is different from true [2023-11-24 23:20:22,320 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:20:22,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657465229] [2023-11-24 23:20:22,321 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 23:20:22,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690592632] [2023-11-24 23:20:22,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690592632] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:20:22,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1860648726] [2023-11-24 23:20:22,357 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-11-24 23:20:22,357 INFO L166 IcfgInterpreter]: Building call graph [2023-11-24 23:20:22,362 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-24 23:20:22,370 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-24 23:20:22,370 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-24 23:20:23,942 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2023-11-24 23:20:23,946 INFO L197 IcfgInterpreter]: Interpreting procedure square with input of size 53 for LOIs [2023-11-24 23:20:23,987 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-24 23:20:27,135 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '563#(and (not (= |ULTIMATE.start_main_~sum1~0#1| |ULTIMATE.start_main_~sum2~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32766) (= |ULTIMATE.start_main_~temp~0#1| 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~index~0#1|) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (<= 2 |ULTIMATE.start_main_~#array1~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 2 |ULTIMATE.start_main_~#array2~0#1.base|) (= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= ~ARR_SIZE~0 32767) (<= 1 ~ARR_SIZE~0))' at error location [2023-11-24 23:20:27,135 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-24 23:20:27,135 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:20:27,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2023-11-24 23:20:27,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600434461] [2023-11-24 23:20:27,136 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-24 23:20:27,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-24 23:20:27,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:20:27,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-24 23:20:27,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1863, Unknown=3, NotChecked=88, Total=2162 [2023-11-24 23:20:27,142 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 21 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-24 23:20:29,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:20:29,668 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2023-11-24 23:20:29,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-24 23:20:29,669 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 26 [2023-11-24 23:20:29,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:20:29,671 INFO L225 Difference]: With dead ends: 62 [2023-11-24 23:20:29,671 INFO L226 Difference]: Without dead ends: 59 [2023-11-24 23:20:29,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 993 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=446, Invalid=3215, Unknown=3, NotChecked=118, Total=3782 [2023-11-24 23:20:29,675 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 82 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-24 23:20:29,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 130 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-24 23:20:29,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-11-24 23:20:29,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 46. [2023-11-24 23:20:29,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 31 states have internal predecessors, (37), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-24 23:20:29,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2023-11-24 23:20:29,692 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 26 [2023-11-24 23:20:29,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:20:29,693 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2023-11-24 23:20:29,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-24 23:20:29,693 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2023-11-24 23:20:29,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-24 23:20:29,695 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:20:29,695 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:20:29,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6184f548-6337-4fc4-aff6-c54bf2bf13d2/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-24 23:20:29,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6184f548-6337-4fc4-aff6-c54bf2bf13d2/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:20:29,902 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:20:29,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:20:29,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1156338807, now seen corresponding path program 2 times [2023-11-24 23:20:29,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:20:29,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736524510] [2023-11-24 23:20:29,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:20:29,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:20:29,930 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 23:20:29,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1668110442] [2023-11-24 23:20:29,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-24 23:20:29,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:20:29,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6184f548-6337-4fc4-aff6-c54bf2bf13d2/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:20:29,932 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6184f548-6337-4fc4-aff6-c54bf2bf13d2/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:20:29,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6184f548-6337-4fc4-aff6-c54bf2bf13d2/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-24 23:20:30,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-24 23:20:30,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 23:20:30,057 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-24 23:20:30,059 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:20:30,150 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-24 23:20:30,150 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:20:30,214 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-24 23:20:30,215 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:20:30,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736524510] [2023-11-24 23:20:30,215 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 23:20:30,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668110442] [2023-11-24 23:20:30,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668110442] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 23:20:30,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [397362469] [2023-11-24 23:20:30,219 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-11-24 23:20:30,219 INFO L166 IcfgInterpreter]: Building call graph [2023-11-24 23:20:30,220 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-24 23:20:30,220 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-24 23:20:30,220 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-24 23:20:31,159 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2023-11-24 23:20:31,162 INFO L197 IcfgInterpreter]: Interpreting procedure square with input of size 8 for LOIs [2023-11-24 23:20:31,164 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-24 23:20:34,689 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '936#(and (not (= |ULTIMATE.start_main_~sum1~0#1| |ULTIMATE.start_main_~sum2~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32766) (= |ULTIMATE.start_main_~temp~0#1| 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~index~0#1|) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (<= 2 |ULTIMATE.start_main_~#array1~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 2 |ULTIMATE.start_main_~#array2~0#1.base|) (= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= ~ARR_SIZE~0 32767) (<= 1 ~ARR_SIZE~0))' at error location [2023-11-24 23:20:34,689 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-24 23:20:34,689 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 23:20:34,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-11-24 23:20:34,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955293867] [2023-11-24 23:20:34,690 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 23:20:34,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-24 23:20:34,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:20:34,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-24 23:20:34,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=534, Unknown=3, NotChecked=0, Total=650 [2023-11-24 23:20:34,692 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-24 23:20:35,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:20:35,005 INFO L93 Difference]: Finished difference Result 60 states and 72 transitions. [2023-11-24 23:20:35,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-24 23:20:35,006 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 27 [2023-11-24 23:20:35,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:20:35,008 INFO L225 Difference]: With dead ends: 60 [2023-11-24 23:20:35,008 INFO L226 Difference]: Without dead ends: 57 [2023-11-24 23:20:35,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=149, Invalid=778, Unknown=3, NotChecked=0, Total=930 [2023-11-24 23:20:35,010 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 31 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:20:35,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 53 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 23:20:35,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-11-24 23:20:35,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 53. [2023-11-24 23:20:35,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 35 states have internal predecessors, (41), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-24 23:20:35,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 63 transitions. [2023-11-24 23:20:35,029 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 63 transitions. Word has length 27 [2023-11-24 23:20:35,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:20:35,029 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 63 transitions. [2023-11-24 23:20:35,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-24 23:20:35,030 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 63 transitions. [2023-11-24 23:20:35,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-24 23:20:35,032 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:20:35,032 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:20:35,047 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6184f548-6337-4fc4-aff6-c54bf2bf13d2/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-24 23:20:35,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6184f548-6337-4fc4-aff6-c54bf2bf13d2/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:20:35,238 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:20:35,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:20:35,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1740742801, now seen corresponding path program 3 times [2023-11-24 23:20:35,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:20:35,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196766335] [2023-11-24 23:20:35,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:20:35,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:20:35,259 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 23:20:35,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [620677781] [2023-11-24 23:20:35,260 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-24 23:20:35,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:20:35,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6184f548-6337-4fc4-aff6-c54bf2bf13d2/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:20:35,261 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6184f548-6337-4fc4-aff6-c54bf2bf13d2/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:20:35,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6184f548-6337-4fc4-aff6-c54bf2bf13d2/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-24 23:20:35,355 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-24 23:20:35,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 23:20:35,357 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-24 23:20:35,360 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:20:35,468 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-24 23:20:35,468 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:20:35,553 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-24 23:20:35,553 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:20:35,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196766335] [2023-11-24 23:20:35,554 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 23:20:35,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620677781] [2023-11-24 23:20:35,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620677781] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 23:20:35,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [763098329] [2023-11-24 23:20:35,557 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-11-24 23:20:35,557 INFO L166 IcfgInterpreter]: Building call graph [2023-11-24 23:20:35,558 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-24 23:20:35,558 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-24 23:20:35,558 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-24 23:20:36,664 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2023-11-24 23:20:36,666 INFO L197 IcfgInterpreter]: Interpreting procedure square with input of size 8 for LOIs [2023-11-24 23:20:36,668 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-24 23:20:38,646 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1347#(and (not (= |ULTIMATE.start_main_~sum1~0#1| |ULTIMATE.start_main_~sum2~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32766) (= |ULTIMATE.start_main_~temp~0#1| 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~index~0#1|) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (<= 2 |ULTIMATE.start_main_~#array1~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 2 |ULTIMATE.start_main_~#array2~0#1.base|) (= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= ~ARR_SIZE~0 32767) (<= 1 ~ARR_SIZE~0))' at error location [2023-11-24 23:20:38,646 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-24 23:20:38,646 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 23:20:38,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-11-24 23:20:38,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7043799] [2023-11-24 23:20:38,647 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 23:20:38,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-24 23:20:38,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:20:38,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-24 23:20:38,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=551, Unknown=2, NotChecked=0, Total=650 [2023-11-24 23:20:38,649 INFO L87 Difference]: Start difference. First operand 53 states and 63 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 5 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2023-11-24 23:20:38,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:20:38,910 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2023-11-24 23:20:38,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-24 23:20:38,910 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 5 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 35 [2023-11-24 23:20:38,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:20:38,912 INFO L225 Difference]: With dead ends: 60 [2023-11-24 23:20:38,912 INFO L226 Difference]: Without dead ends: 35 [2023-11-24 23:20:38,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 74 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=119, Invalid=691, Unknown=2, NotChecked=0, Total=812 [2023-11-24 23:20:38,914 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 32 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:20:38,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 52 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 23:20:38,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-11-24 23:20:38,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2023-11-24 23:20:38,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-24 23:20:38,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2023-11-24 23:20:38,928 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 35 [2023-11-24 23:20:38,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:20:38,929 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2023-11-24 23:20:38,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 5 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2023-11-24 23:20:38,929 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2023-11-24 23:20:38,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-24 23:20:38,931 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:20:38,931 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:20:38,940 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6184f548-6337-4fc4-aff6-c54bf2bf13d2/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-24 23:20:39,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6184f548-6337-4fc4-aff6-c54bf2bf13d2/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:20:39,136 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:20:39,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:20:39,137 INFO L85 PathProgramCache]: Analyzing trace with hash -10878104, now seen corresponding path program 4 times [2023-11-24 23:20:39,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:20:39,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307078156] [2023-11-24 23:20:39,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:20:39,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:20:39,168 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 23:20:39,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1147825756] [2023-11-24 23:20:39,174 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-24 23:20:39,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:20:39,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6184f548-6337-4fc4-aff6-c54bf2bf13d2/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:20:39,175 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6184f548-6337-4fc4-aff6-c54bf2bf13d2/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:20:39,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6184f548-6337-4fc4-aff6-c54bf2bf13d2/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-24 23:20:39,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:20:39,420 WARN L260 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 107 conjunts are in the unsatisfiable core [2023-11-24 23:20:39,426 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:20:39,490 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-24 23:20:39,599 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-11-24 23:20:39,724 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2023-11-24 23:20:40,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:20:41,024 INFO L349 Elim1Store]: treesize reduction 353, result has 14.1 percent of original size [2023-11-24 23:20:41,024 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 6 disjoint index pairs (out of 55 index pairs), introduced 12 new quantified variables, introduced 38 case distinctions, treesize of input 212 treesize of output 214 [2023-11-24 23:20:41,262 INFO L349 Elim1Store]: treesize reduction 40, result has 46.7 percent of original size [2023-11-24 23:20:41,263 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 179 treesize of output 184 [2023-11-24 23:20:41,422 INFO L349 Elim1Store]: treesize reduction 94, result has 1.1 percent of original size [2023-11-24 23:20:41,423 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 96 treesize of output 157 [2023-11-24 23:20:41,640 INFO L349 Elim1Store]: treesize reduction 95, result has 22.8 percent of original size [2023-11-24 23:20:41,640 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 124 treesize of output 70 [2023-11-24 23:20:42,007 INFO L349 Elim1Store]: treesize reduction 83, result has 19.4 percent of original size [2023-11-24 23:20:42,008 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 43 [2023-11-24 23:20:42,362 INFO L349 Elim1Store]: treesize reduction 83, result has 19.4 percent of original size [2023-11-24 23:20:42,362 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 43